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Issue 14, 2013
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2D and 3D bimetallic oxalate-based ferromagnets prepared by insertion of MnIII-salen type complexes

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Abstract

The syntheses, structures and magnetic properties of the compounds of formulae [Mn((R)-salmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH)0.5(CH3CN)1.25 ((RR)-1), [Mn((S)-salmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH)0.5(CH3CN)1.25 ((SS)-1), [Mn((R)-salmen)(CH3OH)2][MnCr(ox)3](CH2Cl2)0.375(CH3OH)0.125(H2O)0.375 ((RRR)-2) and [Mn((S)-salmen)(CH3OH)2][MnCr(ox)3](CH2Cl2)0.375(CH3OH)0.375(H2O)0.125 ((SS)-2) (ox = oxalate, salmen2− = N,N′-(1-methylethylene)bis(salicylideneiminate)), [Mn(salpn)(CH3OH)1.5(CH3CN)0.5][MnCr(ox)3](CH3OH)0.82(H2O)0.93 (3) (salpn2− = N,N′-(propane)bis(salicylideneiminate)) and [Mn(saltmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH) (4) (saltmen2− = N,N′-(1,1,2,2-tetramethylethylene)bis(salicylideneiminate)) are reported. These compounds are prepared by the insertion of MnIII–Schiff base complexes into bimetallic oxalate networks. Different types of bimetallic oxalate networks are obtained for each templating cation. Thus, [Mn((R)-salmen)]+ and [Mn((S)-salmen)]+ chiral templating cations give rise to a 2D chiral bimetallic oxalate layer in acetonitrile in (RR)-1 and (SS)-1 compounds, whereas a new type of achiral 3D oxalate network is obtained with the same templating cation in dichloromethane in (SS)-2 and (RRR)-2. On the other hand, [Mn(salpn)]+ and [Mn(saltmen)]+ give rise respectively to a 3D chiral network and a 2D achiral network in compounds 3 and 4. The magnetic properties of the four compounds indicate that they undergo a long-range ferromagnetic ordering at ca. 5 K.

Graphical abstract: 2D and 3D bimetallic oxalate-based ferromagnets prepared by insertion of MnIII-salen type complexes

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Article information


Submitted
13 Dec 2012
Accepted
21 Jan 2013
First published
23 Jan 2013

Dalton Trans., 2013,42, 5100-5110
Article type
Paper

2D and 3D bimetallic oxalate-based ferromagnets prepared by insertion of MnIII-salen type complexes

M. Clemente-León, E. Coronado and M. López-Jordà, Dalton Trans., 2013, 42, 5100
DOI: 10.1039/C3DT32996H

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